I was implementing some code regarding my prev question and came across some behavior that I can’t wrap my head around when reading chunks from a file. I put the reduced code below. Actually readbytes! doesn’t make the difference, just iterating over buffer in do_open seems to somehow cause these al…

Using do with file handle somehow causes allocations?

GunnarFarneback January 9, 2023, 10:29am 2

The do construction creates an anonymous function which is a closure, and you probably get hit by the infamous issue performance of captured variables in closures · Issue #15276 · JuliaLang/julia · GitHub.

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